Astronomy & Space - March 2007

How do we know the distance and size of the sun for instance? I assume it's not geometry as you must be given the distance to get the size?

Also what about other stars, nebula or galaxies? How do we know their size and distance? How do we know that they're not bigger and further away, or smaller and closer to us?

2007-03-30 08:24:59 · 9 answers · asked by Luis 6

1. a very massive cloud with any density and a lot of angular momentum
2.a low-density cloud with quite a bit of angular momentum
3.a dense cloud with very little angular momentum
4.a dense cloud with quite a bit of angular momentum
5.a very low-density cloud with very little angular momentum
Right now Im thinking number 1 because it is my belief that to form an elliptic galazy you need high amounts of angular momentum, Im open to other opinions and selecytions!

2007-03-30 08:08:39 · 4 answers · asked by matt g 1

If a black hole (mass = M(Sun)) approaches us,
how close it could get before astronomers notice?

I am not sure about velocity, but say it has typical
velocity of nearest local stars.

2007-03-30 07:46:52 · 6 answers · asked by Alexander 6

do you know some incorrect reading from Edgar Cayce ?

2007-03-30 07:23:47 · 6 answers · asked by Chako the Dog 6

planet? but how a cloud can be shaped like an hexagon?. i read the nasa and jpl pages but i don't get it.

2007-03-30 06:56:31 · 4 answers · asked by doom98999 3

2007-03-30 06:46:32 · 8 answers · asked by kanniece 4

What do you think will happen in a realistic and in a potentially best future of mankind concerning Mars.
Could it be transformed into a giant spaceship? Should we experiment by introducing life conditions on it, before the Sun burns it? Would it be a bridge toward Europe?

2007-03-30 06:40:34 · 13 answers · asked by Anonymous

Because the stupid scientist people are all saying that its too small, just and insignifigant piece of rock. but thats what all the planets are. except earth, cuz we live on it. But pluto lives on!!!

2007-03-30 06:18:39 · 26 answers · asked by Hannahsaur 1

If the answer is ' due to refraction in the air of the earth's atmosphere', please state in which direction the rays from the opposite points of the sun's disc bend and why? Please take note that the disc appears perfectly circular.

2007-03-30 06:13:01 · 5 answers · asked by rabi k 2

2007-03-30 06:06:24 · 7 answers · asked by Anonymous

I read in todays paper that if you travelled into space at the speed of light,you would come back before you went....

2007-03-30 05:45:55 · 16 answers · asked by Anonymous

2007-03-30 05:27:36 · 20 answers · asked by Carl D 1

2007-03-30 05:26:52 · 8 answers · asked by tiffany m 1

Which scientist Discovered the planet Venus and When?

2007-03-30 04:51:51 · 9 answers · asked by Anonymous

Give me websites, books or where ever you got the info. Thx

2007-03-30 04:45:34 · 10 answers · asked by Anonymous

I know we have several meteors on their way, the Andromeda Galaxy is headed for us, and the Sun is headed for a Supernova, but is there something about to happen, super big, that I can look forward to and actually witness. Thanks.

2007-03-30 04:23:24 · 5 answers · asked by Ron B. 7

I've been told that the polar caps of Mars are made out of dry ice.That's frozen carbon dioxide.
Well,what kind of ice is that,does it contain water?
Is dry ice of any importance for the hold of life?
What if it's melted somewhere...would it be possible that there are some kind of little lakes in mars,from the melting of this ice?

2007-03-30 04:14:36 · 2 answers · asked by tzanak 1

my original question, so I 'll ask it again.
With X-ray telescopes, how far inside objects do the X-rays penetrate. How powerful would the X-rays have to be to look at ,say a planets core. What do we "see", when we are shown photographs of the sun as seen through an X-ray telescope. How far "in" is that?

2007-03-30 04:12:53 · 12 answers · asked by Anonymous

how many zeros in a billion, and a trillion?

2007-03-30 04:11:15 · 5 answers · asked by old-settler 1

2007-03-30 04:07:17 · 5 answers · asked by vanshika 1

2007-03-30 03:57:38 · 20 answers · asked by Anonymous

pls make a scientific guess to it. my opinion is that vaccum could have reacted to make a product,what are your answers?

2007-03-30 03:14:33 · 8 answers · asked by Anonymous

I think a lot of us are getting tried of this faked moon landing theory. It seems to me that faking Christ's resurrection would have been a lot easier. Now there's a conspiracy theory that should put a lot of folks in a panic.

2007-03-30 03:08:33 · 31 answers · asked by Anonymous

Plz dig down in your heart and be totally honest with yourself when u answer this question and you will see your favoite color in your dream.

2007-03-30 03:03:15 · 6 answers · asked by Nate G 1

I dont think we have have you seen the documentry i think it was shot in area 51.

2007-03-30 02:47:52 · 22 answers · asked by Marshall H 2

2007-03-30 02:25:50 · 3 answers · asked by shanelj1967 2

2007-03-30 02:19:15 · 9 answers · asked by Anonymous

Do you think there is a space between where there is perhaps "soulwork" which takes place?

Is the UNIVERSE "infinite" or "finite" in your "picture of this"?

Is the NUMBER of total "animal life forms" limited(finite)?

2007-03-30 01:50:42 · 17 answers · asked by Anonymous

2007-03-30 01:48:58 · 4 answers · asked by mooza_2000 1

If you did, explain everthing about it, please!

2007-03-30 01:21:28 · 7 answers · asked by Anonymous